The Detroit Lions may have just quietly added their most productive defensive end. Longtime Chicago Bears defensive lineman Israel Idonije reportedly signed today.

According to Pro Football Talk, the deal is for one year. The Lions have not announced the signing nor a corresponding roster move.

Idonije, 32, played nine seasons with the Bears, but he was his most productive over his past three, when he recorded 20.5 of his 28.5 career sacks. Last year, he ranked second on the Bears with 7.5 sacks.

The question now becomes where Idonije fits.

Idonije has played left end the past three years and also slipped inside in the Bears’ nickel package. Will he be used for depth and versatility, or does his arrival signal the move of raw rookie Ziggy Ansah from potential starter to a third-down rush specialist?

Either way, Idonije’s addition likely will be a valuable one. The Lions’ defensive line is in transition and lacks experienced depth with the losses of Cliff Avril, Kyle Vanden Bosch, Sammie Hill and Corey Williams.